Save audio to file (WAV format is used). If the file is exist and have WAV format then audio will be added to the end of the file.
Note: format is not checked. 

Sub MFAudioSaveToFile( _
   ByVal _bsFileName As String, _
   ByVal _bAppend As Integer _
) 

void MFAudioSaveToFile( 
   string _bsFileName,
   int _bAppend
)

procedure MFAudioSaveToFile( 
    _bsFileName: String;
    _bAppend: Integer
); 

void MFAudioSaveToFile( 
   BSTR* _bsFileName,
   int _bAppend
)